Merge #14632: Tests: Fix a comment

Summary:
086fc83571 Tests: Fix a comment (fridokus)

Pull request description:

Fix a comment that was false

Tree-SHA512: 945aa38229545e026e18c3abf53a4fbe6ec36413ce690fff7a1dd89b6e102d2b574524092e0ddf06cace82f3c040c59221b9b942be1203525814d2fbd50aaa0b

Backport of Core PR14632

Test Plan: test_runner.py mempool_resurrect for sanity

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D5900